Article
Chemistry, Physical
Lihua Lai, Guangxing Yang, Qiao Zhang, Hao Yu, Feng Peng
Summary: The cyclic voltammetry testing method for methanol electrooxidation is commonly used to find anodic catalysts for direct methanol fuel cells. The ratio of peak currents is often used to evaluate CO tolerance of Pt-based catalysts, but in this study it is shown that both peak currents are related to methanol consumption at the electrode surface. The peak area ratio is proposed as a criterion related to the overlap between methanol oxidation potentials and the reduction potentials of the oxidized surface.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Hakan Burhan, Kubilay Arikan, Mehmet Hakki Alma, Mehmet Salih Nas, Hassan Karimi-Maleh, Fatih Sen, Fatemeh Karimi, Yasser Vasseghian
Summary: PtCo-based nanoparticles in alloy structure were synthesized using the microwave-assisted reduction method and deposited on different carbon supporting materials. The MOR activity of PtCo nanoparticles in hybrid carbon support structures was found to be more advantageous than single support structures due to the synergistic effect and larger surface area. PtCo@AC-VC catalyst showed relatively high catalytic activity compared to previous studies.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Mohammad Bagher Askari, Seyed Mohammad Rozati, Antonio Di Bartolomeo
Summary: In this study, a new nanocatalyst, Mn3O4-CeO2-rGO, was synthesized and evaluated for the methanol oxidation reaction. The results demonstrated that the nanocatalyst exhibited high oxidation current density and stability, making it a promising and efficient catalyst for the methanol oxidation reaction.
Review
Chemistry, Multidisciplinary
Jianmei Wang, Bingxing Zhang, Wei Guo, Lei Wang, Jian Chen, Hongge Pan, Wenping Sun
Summary: The study of direct methanol fuel cells (DMFCs) has been ongoing for around 70 years, but commercialization is still a distant goal. The methanol oxidation reaction (MOR) is the bottleneck reaction that limits the overall performance of DMFCs. This review summarizes the controversies and progress in electrocatalytic mechanisms, performance evaluations, and design science for MOR electrocatalysts. It also provides an overview of the recent development of emerging MOR electrocatalysts, focusing on the innovation of alloy, core-shell structure, heterostructure, and single-atom catalysts. Perspectives on future research directions are also discussed.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Ajay S. Bangwal, Manisha Chauhan, Prabhakar Singh
Summary: A series of double perovskite oxide materials were synthesized and their catalytic activity in alkaline medium was investigated. The results show that these materials exhibit catalytic activity for both oxygen evolution reaction (OER) and oxygen reduction reactions (ORR). Among them, Pr0.90Ba1.10Co2O6-δ shows the best activity in OER.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Guodong Xu, Yun Lei, Keyu Wu, Rongguan Lv, Jing Li, Xiujuan Sun, Weiwei Cai
Summary: In this study, CeO2 is modified through a plasma-phosphating combing strategy and invited as Frustrated Lewis Pair to assist the catalytic MOR process on Pt sites. This strategy also leads to negatively charged sites on CeO2 surface as a host for Pt anchoring, facilitating the even dispersion of Pt nanocrystals. Moreover, this strategy affects the Ce3+/Ce4+ ratio and vacancy oxygen ratio on CeO2 surface, which are critical for OH generation and anti-CO.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Analytical
Ludwe L. Sikeyi, Themba D. Ntuli, Thomas H. Mongwe, Nobanathi W. Maxakato, Neil J. Coville, Manoko S. Maubane-Nkadimeng
Summary: Well-dispersed ultrafine platinum nanoparticles (Pt NPs) loaded on carbon nano-onions (CNOs) surface were successfully synthesized and their catalytic performance was evaluated. Boron oxide modified carbon nano-onions (B-CNOs) as the support for Pt NPs showed enhanced catalytic activity and stability, which could be attributed to the increased electronic conductivity by boron oxide and the enhanced interaction with water.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Jan Holub, Nataliia Vereshchuk, Francisco-Javier Sanchez-Baygual, Marcos Gil-Sepulcre, Jordi Benet-Buchholz, Antoni Llobet
Summary: The study presented in this report focuses on investigating the catalytic activity of [Ru(tda-kappa-(NO)-O-3)(py)(2)] as a precursor for the ammonia oxidation reaction (AOR). Spectroscopic characterization of the newly synthesized complexes was performed, along with X-ray diffraction analysis of selected compounds. The study also examined the catalytic cycle proposed based on electrochemical and kinetic evidence, achieving promising turnover numbers under bulk electrolysis conditions in acetonitrile.
INORGANIC CHEMISTRY
(2021)
Article
Green & Sustainable Science & Technology
Michaela Roschger, Sigrid Wolf, Bostjan Genorio, Viktor Hacker
Summary: This study successfully improved the performance and reduced costs by reducing the metal content in Pd85Ni10Bi5/C catalysts. The synthesized catalysts showed excellent electrochemical performance and high peak-current densities for the ethanol oxidation reaction.
Article
Chemistry, Physical
Iranna Udachyan, Tomer Zidki, Amir Mizrahi, Shanti G. Patra, Dan Meyerstein
Summary: In this study, Na3CoIII(CO3)(3) was deposited on Pt and Pd electrode surfaces using a chronoamperometric technique. The deposited Na3CoIII(CO3)(3) was characterized and found to exhibit enhanced electrocatalytic activity for methanol oxidation when deposited on Pt electrode. Interestingly, the Na3CoIII(CO3)(3) deposited on Pt electrode also showed good photoelectrocatalytic response under UV-vis light irradiation.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Anni Yu, Ruben Rizo, Francisco J. Vidal-Iglesias, Rosa M. Aran-Ais, Yan-Xia Chen, Enrique Herrero, Juan M. Feliu
Summary: Information on the chemical adsorption and surface oxidation of Ru under electrochemical conditions is crucial for understanding the structure-activity relationship in Ru-based materials. This study investigates the adsorption of hydrogen and oxygen species on quasi-single-crystalline Ru films on Pt(111) electrodes. The formation of Ru-O and the conversion to RuO2 were observed at specific potentials. These findings provide insights into the electrochemical properties and ligand effects of Ru.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Bo-Qiang Miao, Ya-Chong Liu, Yu Ding, Pu-Jun Jin, Pei Chen, Yu Chen
Summary: In this study, high-quality chlorine-free Rh nanodendrites (Rh-NDs) were successfully synthesized by a simple one-step chemical-reduction method. Rh-NDs exhibited high electroactivity for methanol oxidation reaction (MOR) in alkaline direct methanol fuel cells. Under optimal experimental conditions, Rh-NDs showed a significant enhancement in electroactivity and durability for MOR compared to irregular Rh nanocrystals, thanks to their dendritic morphology that provides a large specific surface area, rich corner/edge atoms, and efficient aggregation inhibition.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2022)
Article
Energy & Fuels
Humayra Begum, Mohammed M. Rahman, Mohammad A. Hasnat
Summary: A PtAuCo trimetallic electrode was prepared using a simple electrochemical deposition technique for investigating methanol electro-oxidation. The electrode exhibited higher stability and resistance to CO adsorption compared to conventional Pt and PtAu electrodes.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Mohamed Abd-Elsabour, Abdulrahman G. Alhamzani, Mortaga M. Abou-Krisha
Summary: This article investigates the electrochemical oxidation of methanol at various nickel-modified electrodes in NaOH solution, and finds that the newly developed poly-p-PD/Ni(II)/GE electrode exhibits higher catalytic activity for methanol oxidation. The electrochemical activity and diffusion-controlled process at the surface of the poly-p-PD/Ni(II)/GE electrode are also analyzed.
Article
Chemistry, Physical
Ludwe L. Sikeyi, Themba D. Ntuli, Thomas H. Mongwe, Nobanathi W. Maxakato, Emanuela Carleschi, Bryan P. Doyle, Neil J. Coville, Manoko S. Maubane-Nkadimeng
Summary: This study synthesized three types of nano onions and prepared Pd/CNO electrocatalysts using different methods. The N-CNO and Pd/N-CNO catalysts showed high current density and long-term stability in alkaline medium.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Salehe Gomroki, Zahra Yavari, Ahmad Reza Abbasian, Mahdi Shafiee Afarani, Meissam Noroozifar
Summary: The synthesis and application of a porous Li2TiO3 (LT) promoter for palladium nanoparticles as a stable and efficient electrocatalyst is reported. The LT promoter increases the dispersion of Pd and enhances the efficiency of the electrocatalyst. The nano-Pd stabilized on LT using different reduction approaches showed high dispersion and excellent performance in terms of electrochemical active surface area and anti-CO poisoning behavior.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Biochemistry & Molecular Biology
ShaoPei Li, Aruna Raja, Meissam Noroozifar, Kagan Kerman
Summary: Parkinson's disease (PD) is associated with the aggregation and misfolding of α-synuclein (α-syn) protein. A proof-of-concept study found that pyrroloquinoline quinone (PQQ) can effectively prevent ROS formation and fibrillation of α-syn-119 in the presence of Cu(II), suggesting PQQ as a potential multitarget therapeutic agent for PD.
ACS CHEMICAL NEUROSCIENCE
(2022)
Article
Chemistry, Analytical
Hamid Fini, Qusai Hassan, Meissam Noroozifar, Kagan Kerman
Summary: A novel hybrid bilayer membrane is introduced as a platform for studying the aggregation of amyloid-beta peptide on surfaces. The modified electrodes were characterized using XPS and ToF-SIMS, and electrochemical methods were used to investigate the interaction of the modified surfaces with the amyloid-beta peptide. The results showed a decrease in charge transfer resistance upon incubation of the peptide, indicating the potential of this platform for studying membrane-bound receptors.
Article
Chemistry, Physical
Fatemeh Rigi, Zahra Yavari
Summary: A rapid, green, and easy strategy for the biosynthesis of ZnO-NPs was developed using plant extracts. The synthesized ZnO-NPs were characterized and employed as the support and promoter in the synthesis of Pd/ZnO nanoparticles. Electrochemical studies showed that the oxide synthesized by Ducrosia anethifolia had better promoting behavior for palladium in the oxidation of ethanol, due to its more porous structure resulting in a higher surface area and greater dispersion of palladium.
Article
Nanoscience & Nanotechnology
Celia Ferrag, Meissam Noroozifar, Kagan Kerman
Summary: In this study, an ultralight graphene oxide aerogel decorated with bimetallic palladium-iron nanoparticles was synthesized and immobilized on a glassy carbon electrode for electrochemical sensor applications. The sensor was able to simultaneously detect eight biomolecules and exhibited excellent performance, stability, reproducibility, and sensitivity.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Maryam Abdinejad, Siddhartha Subramanian, Mozhgan Khorasani Motlagh, Meissam Noroozifar, Salatan Duangdangchote, Ihor Neporozhnii, Davide Ripepi, Donato Pinto, Mengran Li, Keith Tang, Joost Middelkoop, Atsushi Urakawa, Oleksandr Voznyy, Heinz-Bernhard Kraatz, Thomas Burdyny
Summary: In this study, a bimetallic Cu-Pd composition on 2D Ti3C2Tx (MXene) nanosheets is formulated to achieve more efficient formate production in CO2RR. By using a membrane electrode assembly (MEA), formate selectivities >90% and the highest reported overall energy efficiency of 47% are achieved at a current density of 150 mA cm(-2). This simple strategy represents an important step towards the experimental demonstration of 3D-MXenes-based electrocatalysts for CO2RR application and opens up a new platform for the fabrication of macroscale aerogel MXene-based electrocatalysts.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Qusai Hassan, Chevon Riley, Meissam Noroozifar, Kagan Kerman
Summary: In this study, a novel hybrid nanomaterial-based electrochemical sensor was developed for the simultaneous detection of four DNA bases. Graphene oxide quantum dots (GOQDs) were synthesized and used to prepare a hybrid nanomaterial with multi-walled carbon nanotubes (GOQD-MWCNT). The modified sensor showed linear calibration plots up to a concentration of 50, 50, 500, and 500 μM for guanine, adenine, thymine, and cytosine, respectively. The sensor was also successfully applied for the determination of DNA bases in artificial saliva samples, with recovery values ranging from 95.9% to 106.8%.
Article
Chemistry, Analytical
Qusai Hassan, Zhixin Meng, Meissam Noroozifar, Kagan Kerman
Summary: Sugarcane biochar and methylene blue were used to develop a graphite paste electrode (GPE-SC-MB) for the simultaneous detection of four DNA bases. The linear ranges and detection limits were as follows: G: 0.67-38.67 μM and 0.037 μM, A: 0.67-126.67 μM and 0.042 μM, and T/C: 6.67-1600 μM and 4.25 μM, 5.33 μM. The GPE-SC-MB showed recovery values between 99.0 and 103.0% when tested in human saliva, indicating the effectiveness of sugarcane biochar as an electrode modifier for sensitive electrochemical sensors.
Article
Chemistry, Analytical
Niloufar Soltani, Qusai Hassan, Meissam Noroozifar, Kagan Kerman
Summary: In this proof-of-concept study, gold nanoparticles (AuNPs) were immobilized on a surface-modified glassy carbon electrode (GCE-Ph-S-AuNPs) using a surface-anchored diazonium salt of 4-aminothiophenol. The attachment of AuNPs onto the modified electrode surface was confirmed by X-ray photoelectron spectroscopy. Differential pulse voltammetry was performed to simultaneously determine guanine (G) and 8-hydroxyguanine (8-OH-G), with linear calibration curves up to 140 μM and 60 μM, and detection limits of 0.02 μM and 0.021 μM for G and 8-OH-G, respectively. Chronoamperometric studies were also conducted to determine the diffusion coefficients of 8-OH-G and G. The GCE-Ph-S-AuNPs were successfully applied to determine G and 8-OH-G in genomic DNA-spiked samples with recovery rates between 98.5% and 103.3%. This novel electrochemical surface provides a potential platform for the sensitive detection of 8-OH-G related to oxidative stress-induced DNA damage in clinical studies.
Article
Chemistry, Analytical
Niloufar Soltani, Meissam Noroozifar, Kagan Kerman
Summary: In this proof-of-concept study, a graphite paste electrode modified with a hybrid nanocomposite of multi-walled carbon nanotubes and iron-oxide nanoparticles was developed for the simultaneous voltammetric detection of guanine and inosine. The modified electrode showed enhanced electrocatalytic activity and good detection performance in commercially available bovine serum samples. This nanocomposite-modified sensor holds promise for the detection of guanine and inosine in pharmaceutical formulations and biological samples, serving as biomarkers of oxidative damage related to cancer research.
Article
Chemistry, Physical
Sona Niroomand, Abbas Jahanara, Shohre Jahani, Ghasem Sargazi, Brian O. Patrick, Meissam Noroozifar, Mozhgan Khorasani-Motlagh
Summary: UV-Vis and IR spectroscopy, elemental analysis, and X-ray crystallography were used to characterize a novel dimeric Lanthanum(III) complex with 1,10-phenanthroline (phen). The compound exhibited antibacterial, anticancer, and DNA and protein binding properties. Molecular modeling and absorption and fluorescence spectroscopy methods were used to study the binding qualities and thermodynamic parameters. The complex showed good antibacterial action, significant cytotoxicity, and high affinity for DNA and protein binding.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Fariba Kaedi, Ali Vahabi, Simin Rahat-Dahmardeh, Zahra Yavari, Hamideh Saravani, Ahmad Reza Abbasian
Summary: One of the key aspects in electrocatalyst design is the selection of a suitable support material. Cerium (IV) oxide (CeO2) and Nickel (II) oxide (NiO) enhance the concentration of adsorbed Hydroxyl (OHads) species and decrease the onset potential in ethanol oxidation due to their redox properties. Graphene oxide (GO) is chosen as a support material for its anti-poisoning effect and good electrical conductivity. The synergistic effects of CeO2, NiO, and GO greatly improve the electrochemical active surface area of Pd-NiO-CeO2-GO electrocatalyst, leading to higher anodic current and long-term stability in ethanol oxidation compared to other modified electrocatalysts.
RESULTS IN CHEMISTRY
(2023)
Article
Chemistry, Analytical
Yilei Xue, Qusai Hassan, Meissam Noroozifar, Ruby May A. Sullan, Kagan Kerman
Summary: In this proof-of-concept study, a microfluidic flow injection analysis system using multiwalled carbon nanotube-modified screen-printed carbon electrodes modified with copper nanoparticles was developed for the sensitive detection of dopamine. The system showed high sensitivity and reproducibility, and has the potential to be used as an electrochemical point-of-care device for rapid dopamine detection.
Article
Chemistry, Physical
Zehao Fang, Junyan Wang, Yilei Xue, Mozhgan Khorasani Motlagh, Meissam Noroozifar, Heinz-Bernhard Kraatz
Summary: In this study, a bimetallic palladium-copper aerogel was synthesized and used for modification of a graphite paste electrode, enabling the sensitive determination of bisphenol A. The properties of the modified electrode were characterized using various techniques, and it was found to exhibit good selectivity, stability, and sensitivity for BPA determination.
